Die for making valve-casings for wind-musical-instrument valves



E. J. GU LICK. DIE FOR MAKING VALVE CASINGS FOR WIND MUSICAL INSTRUMENT VALVES. APPLICATION FILED OCT. 28. I9I8. 1,345,921, Patented July 6,1920.

0 WM WW QMHM Ill-l Attorney UNITED STATES PATENTOFFICE.

EDWARD J. GULICK, OF ELKI-IART, INDIANA, ASSIGNGR T 0. G CONN, LTIl, OF ELKHART, INDIANA, A CORPORATION GE INDIANA.

DIE FOR MAKING VALVE-OASINGS FOR WIND-WI'USICALJNEwTRUMENT VALVES.

Specification of Letters Patent.

Patented uly 6, 1920.

Application filed October 28, 1918. Serial No. 260,010.

To all whom it may concern:

Be it known that I, EDWARD J. GULIoK, a citizen of the United States, residing at Elkhart, county of Elkhart, Indiana, have invented certain Dies for Making Valve- Casings for lVind-Musical -Instrument Valves, of which the following is a specification.

V This invention relates to dies or devices for making a one piece valve casing for wind musical instrument valves of the horn or cornet type, although the invention may be used for making valve casings for all windinusical instrument valves of the piston type.

l-leretofore valve casings of the general character herein described have been made of two or more separate pieces of metal separately machined or finished in a lathe and thereafter permanently joined together brazing, screw threads, or otherby weldin wise, which method and structure is compln rated, expensive and not always productive of the best results.

The object of my invention 1Stl16 production of dies ordevices whereby a metal valve .ing the valve casing expanded by the arbor member; if is a-fragment showing the same members prior to the introduction of the expanding arbor; Fig. 6 is a view of the valve casing body prior to die introduction; Fig. 7 is a top plan view of the thread forming die; and Fig. 8 is a section takenon the line 8-8 of Fig. 7. Similar numerals of reference indicate like members and parts of members throughout the several views on the drawing.

Referring to the drawing in detail, the numeral 1 indicates a wind musical instrument of the cornet type in which the valve casing 2 is shown partially in section and within which a piston valve 3 is arranged. The numeral lindicates a Valve casing cap is the larger.

which may be screw threaded upon the upper end of the casing 2 and is suitably apertured to. permit the passage of the valve stem 5 which is adapted to carry the usual presser key 6.

My improved dies or devices enable the construction of a valve casing from a single piece of ductile metal tubing, usually brass, of substantially uniform diameter. At Fig. 2 of the drawing a finished one piece valve casing is illustrated, wherein the numeral 7 indicates the cylindrical valve chamber connected with the enlarged portion 8 the bore whereof is somewhat larger than the bore of the portion 7, the end of the portion 8 being exteriorly screw threaded at 9 'to receive the threaded cap member 4. The numeral 10 indicates a shoulder formed at the junction of the different casing bores which issadapted to serve as a seat for the prongs of the valve spring scat (not shown) which is well known in the art. The numerals- 11, 11 indicate a plurality of air passages formed in the casing portion 7 which are adapted to be placed in communication with the main cornet air passages and with which the piston valve passages (not shown) are adapted to register.

Numerals 12 and 13 indicate a pair of cooperating half die members removably and adjustably arranged within the die box 14 and adapted to be rigidly held in cooperation by the set screws 15, 15 mounted in the box member. The die members 12 and 13 are formed with cooperating semi-cylindrical bores 16 and 19, respectively, and 17 and 20, respectively, which form the valve casing forming bores, the upper-bore whereof (indicated by the numerals 17 and 20) The die members 12 and 13 are formed alsowith the semicylindrical recesses 18 and 21, respectively, adapted for cooperation, which are adapted to serve as a seat or compartment for the annular thread forming die 22, the latter being centrally apertured and formed with the screw threads 23 within said. aperture. The die 22 is formed also with a plurality of lugs .24; on its upper face which are adapted to be engaged by a spanner wrench, for the purpose hereinafter specified.

Numeral 25 indicates a cylindrical arbor member rigidly fixed in a carrier member 26 adapted to be connected with or secured in and actuated by a press of any suitable character, said arbor having an annular enlarged portion 27 adjacent its lower end, the latter being somewhat reduced at its extremity 28. Numeral 29 indicates a cylindrical ductile metal tube of substantailly uniform thickness and diameter and provided with a'relatively short cylindrical reduced portion 30 at one end thereof, the latter being adapted to have screw threads formed thereon by expansion into the thread forming die 22, as hereinafter described.

In the construction of my improved valve casing the tube 29 is placed in the die bores with the reduced portion 30 uppermost.

V Thereupon, the die member 22 is arranged within the recesses 18 and 21, the threads 23 whereof being thereby arranged around and adjacent the exterior surface of the reduced tube portion 30. Thereupon, the dies 12 and 13- are closed by the operation of the set screws 15, theposition of the members mentioned being clearly shown in Fig. 5 of the drawing. Thereupon, the plunger arbor 25 is thrust into the interior of the tube 29 for a portiononly of its length, the tube being thereby expanded uniformly into thebore 1 portion 17 and 20 by the enlargement 27 and the metal of the outer periphery ofvthe re- 7 du'cedportion 30 thereof is forced into the interstices of the screw threads 23 of the die 22, thereby formingscrew threads upon the outer periphery of said portion 30; The condition of the tube 29 after the operation of the arbor 25 as described is clearly indi-' cated in Fig. 4' of the drawing. Thereafter,"

the tube is removed from the dies 12 and 13, the thread forming die 22 is unscrewed with a spanner wrench, or otherwise,and the un finished casing member is then provided.

provided also with an enlarged bore section V into whlch the metal of the valve casing may be pressed; a screw thread forming die encompassing a portion of the valve casing;

and an arbor member adapted to forcibly engage the inner wall of thevalve casing for expanding and forcing the metal thereof into the enlarged bore section of the die and into the interstices of the threadsof said screw thread forming die. 7

2. In a device for shaping a one piece wind instrument valve casing, a die member composed ofa plurality of sections and having a bore within which the valve casing is adapted to be confined during the shaping operation, each die section having a recess therein adjacent one end of said bore the plurality ofrecesses in said die sections cooperating to form'one complete recess encompassing one end of said bore; a screw thread formingdie arranged within said recess and encompassing a portion of the valve casing; means for clamping the die section together in operative relation; and

I an arbor member adapted to forcibly engage the inner wall of the valve casing for expanding and forcing the metal thereof into the interstices of the threads of said thread forming die. 7 I

3. In a device for shaping a one piece wind instrument valve casing, a die member having a bore within which the valve casin is adapted to be confined, said die having a recess encompassing one end of said bore; a screw thread forming die arranged Within said recess and encompassing a portion of the valve casing; and an arbor member adapted to forcibly engage the inner wall of the valve casing for expanding and forcing the metal'thereof into the interstices of the threads of said thread forming die, said die being provided with means adapted to receive a tool for unscrewing same from the threads formed in said valve asing.

4. In a device for shaping a one piece wind instrumentvalve casing, a die member having a bore within which the valve casing is adapted to be confined, said die having a recess encompassing one end of said bore; a screw thread forming die arranged within said recess and encompassing a portion of the valve casing; and an arbor member adapted to forcibly engage the inner wall of the valve casing for expanding and forcing the metal thereof into the interstices of the threads of said thread forming die, said die being provided with a plurality of projections adapted to receive a tool for unscrewing said die from the threads formed in said casing. j

In testimony whereof I have hereunto aflixed my signature this 24th day of'October, 1918.

V EDWVARDJ. GULICK. 

